add graphviz-dot-mode

lisp/init-org.el

@@ -83,5 +83,9 @@
 (with-eval-after-load 'ob-plantuml
   (setq org-plantuml-exec-mode 'plantuml))
 
+(with-eval-after-load 'org-src
+  (defvar org-src-lang-modes)
+  (add-to-list 'org-src-lang-modes  '("dot" . graphviz-dot)))
+
 
 (provide 'init-org)